There are several ways for designers to share mockups with their clients including screenshots, presentations and videos, but none of them are as hassle free as MockUps. MockUps is a tool that let you quickly upload your mockup online along with a background image and share it through a custom URL.

You can also choose the alignment of your mockup image or background image, or simply set the background color by providing a hex value. If you want, you can also choose to tile your background image horizontally or vertically. The best part however is that you can just double click on any area of the mockup and add an annotation. Once done, you will get a short custom URL that you can simply send to your clients.